1. FILMEXT Macbook pro 14 inch screen Protector(M2 M1) blocks 69.7% blue light. Macbook Pro 14 inch 2023-2021 screen protector blocks the harmful blue light between 380nm~490nm from the wave range of visible lights,blue light reaches the retina with strong energy. The Macbook Pro 14 M2 blue light screen filter also reduces digital eye strain when viewing screens and gives you a better sleeping. Compatible with Macbook Pro 14" 2023 M2 A2779 /2021 M1 A2442.2.Macbook pro 14 inch blue light screen protector is suitable for students, teachers, office workers, home office workers, social media lovers, online gamers, fashion lovers, people with myopia, etc.3.Clean the screen and ensure it is dust-free, align the product to the screen, gently press over on the frame to remove the bubbles, and let the silicone adhere to the frame. Please feel free to contact us if you have any questions about the product or our service.